The Secretary shall study the effects of global climate change on agriculture and forestry. The study shall, at a minimum address-
(A) the effects of simultaneous increases in temperature and carbon dioxide on crops of economic significance;
(B) the effects of more frequent or more severe weather events on such crops;
(C) the effects of potential changes in hydrologic regimes on current crop yields;
(D) the economic effects of widespread and increased drought frequency in the south, midwest, and plains States; and
(E) changes in pest problems due to higher temperatures.
If the results of the study conducted under paragraph (1) warrant, the Secretary shall conduct further studies that address the means of mitigating the effects of global climate change on crops of economic significance that shall, at a minimum-
(A) identify whether climate change tolerance can be bred into these crops, the amount of time necessary for any such breeding, and the effects on the income of farmers;
(B) evaluate existing genetic resource and breeding programs for crops for their ability to develop new varieties that can tolerate potential climate changes; and
(C) assess the potential for the development of crop varieties that are tolerant to climate changes and other environmental stresses, such as drought, pests, and salinity.
The Secretary shall conduct a study on the emissions of methane, nitrous oxide, and hydrocarbons from tropical and temperate forests, the manner in which such emissions may affect global climate change; the manner in which global climate change may affect such emissions; and the manner in which such emissions may be reduced through management practices. The study shall, at a minimum-
(1) obtain measurements of nitrous oxide, methane, and nonmethane hydrocarbons from tropical and temperate forests;
(2) determine the manner in which the nitrous oxide, methane, and nonmethane hydrocarbon emissions from temperate and tropical forest systems will respond due to climate change; and
(3) identify and address alternative management strategies for temperate and tropical forests that may mitigate any negative effects of global climate change.
The Secretary shall submit reports of the studies conducted under subsections (a) and (b) within 3 and 6 years, respectively, after November 28, 1990, to the Committee on Agriculture and the Committee on Science, Space, and Technology of the House of Representatives, and the Committee on Agriculture, Nutrition, and Forestry of the Senate. In addition, interim reports regarding such studies shall be provided by the Secretary to such Committees annually, with recommendations for actions which may be taken to mitigate the negative effects of global climate change and to adapt to global climate changes and related phenomena.
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