A view of a farm field near the West Woods on the edge of Wiltshire's Marlborough Downs, in Britain, July 29, 2020. Geochemical testing indicates that 50 of Stonehenge's 52 pale-grey sandstone megaliths, known as sarsens, share a common origin. REUTERS/Simon Dawson

Horses graze in a field in front of West Woods on the edge of Wiltshire's Marlborough Downs, in Britain, July 29, 2020. Geochemical testing indicates that 50 of Stonehenge's 52 pale-grey sandstone megaliths, known as sarsens, share a common origin. REUTERS/Simon Dawson

A farm field is seen by West Woods on the edge of Wiltshire's Marlborough Downs, in Britain, July 29, 2020. Geochemical testing indicates that 50 of Stonehenge's 52 pale-grey sandstone megaliths, known as sarsens, share a common origin. REUTERS/Simon Dawson

A farm field is seen by West Woods on the edge of Wiltshire's Marlborough Downs, in Britain, July 29, 2020. Geochemical testing indicates that 50 of Stonehenge's 52 pale-grey sandstone megaliths, known as sarsens, share a common origin. REUTERS/Simon Dawson

Farm fields are seen by West Woods on the edge of Wiltshire's Marlborough Downs, in Britain, July 29, 2020. Geochemical testing indicates that 50 of Stonehenge's 52 pale-grey sandstone megaliths, known as sarsens, share a common origin. REUTERS/Simon Dawson

A peacock butterfly sits on a plant at West Woods on the edge of Wiltshire's Marlborough Downs, in Britain, July 29, 2020. Geochemical testing indicates that 50 of Stonehenge's 52 pale-grey sandstone megaliths, known as sarsens, share a common origin. REUTERS/Simon Dawson

A farmer's field is seen in front of the West Woods on the edge of Wiltshire's Marlborough Downs, in Britain, July 29, 2020. Geochemical testing indicates that 50 of Stonehenge's 52 pale-grey sandstone megaliths, known as sarsens, share a common origin. REUTERS/Simon Dawson

A bumblebee hovers near a flower at West Woods on the edge of Wiltshire's Marlborough Downs, Britain, July 29, 2020. Geochemical testing indicates that 50 of Stonehenge's 52 pale-grey sandstone megaliths, known as sarsens, share a common origin. REUTERS/Simon Dawson

A sign stands at the entrance to West Woods on the edge of Wiltshire's Marlborough Downs, Britain, July 29, 2020. Geochemical testing indicates that 50 of Stonehenge's 52 pale-grey sandstone megaliths, known as sarsens, share a common origin. REUTERS/Simon Dawson

Trees and flowers are seen at West Woods on the edge of Wiltshire's Marlborough Downs, Britain, July 29, 2020. Geochemical testing indicates that 50 of Stonehenge's 52 pale-grey sandstone megaliths, known as sarsens, share a common origin. REUTERS/Simon Dawson

Trees stand inside West Woods on the edge of Wiltshire's Marlborough Downs, Britain, July 29, 2020. Geochemical testing indicates that 50 of Stonehenge's 52 pale-grey sandstone megaliths, known as sarsens, share a common origin. REUTERS/Simon Dawson

People walk on a path through the West Woods on the edge of Wiltshire's Marlborough Downs, in Marlborough, Britain, July 29, 2020. Geochemical testing indicates that 50 of Stonehenge's 52 pale-grey sandstone megaliths, known as sarsens, share a common origin. REUTERS/Simon Dawson

Leigh Tuttle takes a picture of pale orange mold behind the door of the guest bathroom in the basement of Krista Lindholm's house at Joint Base Lewis-McChord, Washington, U.S. May 13, 2019. Picture taken May 13, 2019. To match Special Report USA-HOUSING/MAP REUTERS/Lindsey Wasson

A building is pictured through trees amid heave smog on a polluted day in Beijing, China December 2, 2018. REUTERS/Jason Lee

A general view shows the city of Sofia covered in smog, Bulgaria, December 1, 2018. Picture taken December 1, 2018. REUTERS/Stoyan Nenov

A general view shows the city of Sofia covered in smog, Bulgaria, December 1, 2018. Picture taken December 1, 2018. REUTERS/Stoyan Nenov

A general view shows the city of Sofia, Bulgaria, December 1, 2018. Picture taken December 1, 2018. REUTERS/Stoyan Nenov

A general view shows the city of Sofia covered in smog, Bulgaria, December 1, 2018. Picture taken December 1, 2018. REUTERS/Stoyan Nenov

The Thames Barrier fades into early morning fog on the Thames, in London, Britain, November 27, 2019. REUTERS/Steven Watt

The Houses of Parliament are seen on a foggy morning in London, Britain, November 27, 2018. REUTERS/Toby Melville

The Houses of Parliament are seen on a foggy morning in London, Britain, November 27, 2018. REUTERS/Toby Melville

Trees are silhouetted at sunrise during a foggy winter morning at Khokana in Lalitpur, Nepal November 27, 2018. REUTERS/Navesh Chitrakar

A man carrying hay stacks walks along the field during a foggy winter morning at Khokana in Lalitpur, Nepal November 27, 2018. REUTERS/Navesh Chitrakar

Snow covered trees are seen in fog in central Kiev, Ukraine November 26, 2018. REUTERS/Gleb Garanich

A pigeon flies in fog at a park in central Kiev, Ukraine November 26, 2018. REUTERS/Gleb Garanich

A Cibeles brand Pale Ale beer is poured into a glass at the Cibeles microbrewery in Leganes, near Madrid, Spain June 5, 2018. REUTERS/Paul Hanna

A Cibeles brand Pale Ale beer is poured into a glass at the Cibeles microbrewery in Leganes, near Madrid, Spain June 5, 2018. REUTERS/Paul Hanna

A Cibeles brand Pale Ale beer is poured into a glass at the Cibeles microbrewery in Leganes, near Madrid, Spain June 5, 2018. REUTERS/Paul Hanna

A bottle of Cibeles brand Pale Ale beer is seen at the Cibeles microbrewery in Leganes, near Madrid, Spain June 5, 2018. REUTERS/Paul Hanna

A bottle of Cibeles brand Pale Ale beer is seen at the Cibeles microbrewery in Leganes, near Madrid, Spain June 5, 2018. REUTERS/Paul Hanna

A bottle of Cibeles brand Pale Ale beer is seen at the Cibeles microbrewery in Leganes, near Madrid, Spain June 5, 2018. REUTERS/Paul Hanna

A Cibeles brand Pale Ale beer is poured into a glass at the Cibeles microbrewery in Leganes, near Madrid, Spain June 5, 2018. REUTERS/Paul Hanna

A keg of Harry and Meghan's Windsor Knot pale ale is seen ready for dispatch at the Windsor and Eton brewery in Windsor, Britain April 11, 2018. Picture taken April 11, 2018. REUTERS/Peter Nicholls

Boxes of Harry and Meghan Windsor Knot pale ale are seen on sale at the Windsor and Eton brewery in Windsor, Britain April 11, 2018. Picture taken April 11, 2018. REUTERS/Peter Nicholls

A man drinks from a pint of Harry and Meghan's Windsor Knot pale ale in a pub in Eton, Britain April 11, 2018. Picture taken April 11, 2018. REUTERS/Peter Nicholls

Bottles of Harry and Meghan's Windsor Knot pale ale are seen on display at the Windsor and Eton brewery in Windsor, Britain April 11, 2018. Picture taken April 11, 2018. REUTERS/Peter Nicholls

Menu boards of beers including the Harry and Meghan Windsor Knot pale ale are seen at the Windsor and Eton brewery in Windsor, Britain April 11, 2018. Picture taken April 11, 2018. REUTERS/Peter Nicholls

Bottles of Harry and Meghan's Windsor Knot pale ale are seen on display at the Windsor and Eton brewery in Windsor, Britain April 11, 2018. Picture taken April 11, 2018. REUTERS/Peter Nicholls

Bottles of Harry and Meghan's Windsor Knot pale ale are seen on display at the Windsor and Eton brewery in Windsor, Britain April 11, 2018. Picture taken April 11, 2018. REUTERS/Peter Nicholls

A man drinks from a pint of Harry and Meghan's Windsor Knot pale ale in a pub in Eton, Britain April 11, 2018. Picture taken April 11, 2018. REUTERS/Peter Nicholls TPX IMAGES OF THE DAY

A taster glass is filled with Harry and Meghan's Windsor Knot pale ale at the Windsor and Eton brewery in Windsor, Britain April 11, 2018. Picture taken April 11, 2018. REUTERS/Peter Nicholls

A drinker holds a pint of Harry and Meghan's Windsor Knot pale ale in a pub in Eton, Britain April 11, 2018. Picture taken April 11, 2018. REUTERS/Peter Nicholls

A worker prepares barley malt at the start of the brewing process of Harry and Meghan's Windsor Knot pale ale at the Windsor and Eton brewery in Windsor, Britain April 11, 2018. Picture taken April 11, 2018. REUTERS/Peter Nicholls

Allende India Pale Ale which is brewed in Mexico's San Miguel de Allende, is seen at a craft beer bar in Monterrey, Mexico June 20, 2017. Picture taken June 20, 2017. REUTERS/Daniel Becerril

A beer tap features Australian-made Coopers Brewery pale ale as the beer of the month at The Rocks district of Sydney, Australia March 15, 2017. REUTERS/Jason Reed

A bartender pours pints of Australian-made Coopers Brewery pale ale beer at a pub in Sydney, Australia, March 15, 2017. REUTERS/Jason Reed

A beer tap features Australian-made Coopers Brewery pale ale as the beer of the month at The Rocks district of Sydney, Australia, March 15, 2017. REUTERS/Jason Reed

Cans of Fuller's London Porter, Guinness Draught and bottles of Indian Pale Ale and Double Stout beer of Shepherd Neame & Co. are offered at a supermarket of Swiss retail group Coop in Zumikon, Switzerland December 13, 2016. REUTERS/Arnd Wiegmann

Bottles of Indian Pale Ale and Double Stout beer of Shepherd Neame & Co. are offered at a supermarket of Swiss retail group Coop in Zumikon, Switzerland December 13, 2016. REUTERS/Arnd Wiegmann

Cans of Fuller's London Porter, Guinness Draught and bottles of Indian Pale Ale and Double Stout beer of Shepherd Neame & Co. are offered at a supermarket of Swiss retail group Coop in Zumikon, Switzerland December 13, 2016. REUTERS/Arnd Wiegmann

A faded sticker of former Democratic Presidential candidate Bernie Sanders is seen on a protester's box during a demonstration against the election of Republican Donald Trump as President of the United States in Philadelphia, Pennsylvania, U.S. November 14, 2016. REUTERS/Mark Makela

Milorad Dodik, President of Republika Srpska, speaks after the results of a referendum over a disputed national holiday during an election rally in Pale, Bosnia and Herzegovina, September 25, 2016. REUTERS/Dado Ruvic

Milorad Dodik, President of Republika Srpska, speaks after the results of a referendum over a disputed national holiday during an election rally in Pale, Bosnia and Herzegovina, September 25, 2016. REUTERS/Dado Ruvic

Milorad Dodik, President of Republika Srpska, speaks after the results of a referendum over a disputed national holiday during an election rally in Pale, Bosnia and Herzegovina, September 25, 2016. REUTERS/Dado Ruvic

Milorad Dodik (R), President of Republika Srpska, celebrates the results of a referendum over a disputed national holiday during an election rally in Pale, Bosnia and Herzegovina, September 25, 2016. REUTERS/Dado Ruvic

Milorad Dodik (C), President of Republika Srpska, celebrate the results of a referendum over a disputed national holiday during an election rally in Pale, Bosnia and Herzegovina, September 25, 2016. REUTERS/Dado Ruvic

Supporters of the Alliance of Independent Social Democrats (SNSD) celebrate the results of a referendum over a disputed national holiday during an election rally in Pale, Bosnia and Herzegovina, September 25, 2016. REUTERS/Dado Ruvic

Supporters of the Alliance of Independent Social Democrats (SNSD) celebrate the results of a referendum over a disputed national holiday during an election rally in Pale, Bosnia and Herzegovina, September 25, 2016. REUTERS/Dado Ruvic

Supporters of the Alliance of Independent Social Democrats (SNSD) celebrate the results of a referendum over a disputed national holiday during an election rally in Pale, Bosnia and Herzegovina, September 25, 2016. REUTERS/Dado Ruvic

Bottles of San Miguel Pale Pilsen and Red Horse, products of San Miguel Brewery is pictured at a supermarket in Manila March 30, 2016. REUTERS/Erik De Castro