upstream

Like a salmon returning upstream.

Aramco did not comment on the letter when contacted by BBC Sport but has previously said it has "one of the lowest upstream carbon footprints in the industry".

Less than two months after the removal of dams restored a free-flowing Klamath River, salmon have made their way upstream to begin spawning and have been spotted in Oregon for the first time in more than a century.

Biologists from the California Department of Fish and Wildlife have spotted fall-run Chinook salmon in tributaries miles upstream from where Iron Gate Dam was removed.

Earlier this month, scientists with the nonprofit group California Trout announced they had captured images of the first Chinook salmon swimming upstream from where Iron Gate Dam once stood.