; and (B) State, local, Tribal, and territorial governments; and (2) relevant owners and operators of critical infrastructure. (d) Climate change defined The term climate change refers to detectable changes in one or more climate system components that is directly or indirectly attributed to— (1) human activity; and (2) altering the composition of the global atmosphere. . (b) Report to congress Not later than one year after the date of the enactment of this section and annually thereafter for three years, the Under Secretary for Science and Technology of the Department of Homeland Security shall submit to the Committee on Homeland Security and the Committee on Science, Space, and Technology of the House of Representatives and the Committee on Homeland Security and Governmental Affairs of the Senate a report on any research and development activities carried out pursuant to section 324 of the Homeland Security Act of 2002, as added by subsection (a). (c) Clerical amendment The table of contents in section 1(b) of the Homeland Security Act of 2002 is amended by inserting after the item relating to section 323 the following new item: Sec. 324. Climate change research and development. .