Which affects the rate of photosynthesis the least? 1. oxygen
2. light energy
3. water
4. carbon dioxide

i think it's 4 but don't take my word on it

explanation:

they can be good for the ecosystem

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.