; (B) bioenergy; and (C) biobased materials; (2) to improve understanding of the global carbon cycle, including processes for removing carbon dioxide from the atmosphere, through photosynthesis and other biological processes, for sequestration and storage; and (3) to understand the biological mechanisms used to transform, immobilize, or remove contaminants from subsurface environments. (b) Limitation for research funds The Director shall not approve new climate science-related initiatives without making a determination that such work is well-coordinated with any relevant work carried out by other Federal agencies. (c) Low-Dose radiation research program (1) In general The Director shall carry out a research program on low-dose radiation. (2) Purpose The purpose of the program is to enhance the scientific understanding of, and reduce uncertainties associated with, the effects of exposure to low-dose radiation to inform improved risk-management methods. 307. Fusion energy (a) Fusion materials research and development As part of the activities authorized in section 978 of the Energy Policy Act of 2005 ( 42 U.S.C. 16318 )— (1) the Director, in coordination with the Assistant Secretary for Nuclear Energy of the Department, shall carry out research and development activities to identify, characterize, and demonstrate materials that can endure the neutron, plasma, and heat fluxes expected in a fusion power system; and (2) the Director shall provide an assessment of— (A) the need for one or more facilities that can examine and test potential fusion and next generation fission materials and other enabling technologies relevant to the development of fusion power