Explain the reason why some chemicals persist whilst some degrade in the environment

Some chemicals persist while some chemicals degrade in the environment. The main reason of persistence is their structure composition. Some chemicals when exposed to light, they are broken down into fragments and degradation occurs. Chemicals containing halogens groups molecules are resistant to environmental stress so they remain in the environment for very long time and causes damage to the organisms.

regents of the university of california v. bakke, 438 u.s. 265 (1978), was a landmark decision by the supreme court of the united states. it upheld affirmative action, allowing race to be one of several factors in college admission policy.

more words for this could be abiotic and biotic

abiotic: living organisms within an ecosystem

biotic: non-living organisms within an ecosystem