New risk limits for 18 pesticides in surface water Evidence suggests that existing standards for some of these substances do not sufficiently protect the ecosystem. For others, no standards exist yet or the existing standards are outdated. If these
Without measures emissions of HFC greenhouse gases will increase rapidly Without global agreement on the use of HFCs, their contribution to the greenhouse effect may increase sharply to 10 percent of that of CO2 by 2050. The current contribution is less than 1 percent.