a case on global warming, a first in the history of the us Supreme Court, was recently taken up for oral arguments. This, despite inaction by the government and a highly polarised court. The case, Massachusetts vs Environmental Protection Agency (epa) concerns the federal environmental agency's refusal to regulate carbon dioxide (co₂ a leading greenhouse gas, under the us Clean Air Act, 1963.

Under the act, epa regulates air pollutants emitted from new motor vehicles that "may reasonably be anticipated to endanger public health or welfare'.a case on global warming, a first in the history of the us Supreme Court, was recently taken up for oral arguments. This, despite inaction by the government and a highly polarised court. The case, Massachusetts vs Environmental Protection Agency (epa) concerns the federal environmental agency's refusal to regulate carbon dioxide (co₂), a leading greenhouse gas, under the us Clean Air Act, 1963.

Under the act, epa regulates air pollutants emitted from new motor vehicles that "may reasonably be anticipated to endanger public health or welfare'.