Pandemic and energy transition usher in new needs for firms' expertise as reality finally sets in on the globe's ecological fragility. See which firms made this year's list.

Back-to-back May actions by Dutch judges and oil major shareholders focus pressure to accelerate CO2 cuts as White House orders more business and government disclosure of climate-linked financial risks.

All departments, agencies would get spending hike—except Army Corps civil works.

ArcelorMittal, the world’s largest steelmaker, recently introduced a program to offer certificates to customers that certify they have reduced their carbon footprint through the steelmaker’s own greenhouse-gas emission reductions.