Home › UP Board Class 10 › Science › Our Environment › Why must global cooperation continue even after …
Why must global cooperation continue even after CFCs are banned?
AExisting CFCs in the atmosphere last decades; replacement chemicals can also harm ozone
BCFCs are very heavy and never reach the stratosphere (option)
CCleaning the ozone layer requires solar panels
DCFCs are easily destroyed by sunlight
Answer & Solution
Correct answer: A. Existing CFCs in the atmosphere last decades; replacement chemicals can also harm ozone
1. CFC molecules already in the atmosphere persist for many decades.
2. Some substitutes (HCFCs, HFCs) also have ozone or greenhouse impacts.
3. Continued monitoring and adoption of safer alternatives are needed.
_Source: NCERT Class 10 Science, Ch 13 "Our Environment", §13.2.1_
Related questions
The maximum concentration of accumulated pesticides in a food chain is usually found inWhich one of the following is a non-biodegradable waste?Substances that are broken down by biological processes are said to beThe chemicals mainly responsible for the depletion of the ozone layer areThe ozone layer in the upper atmosphere is important because itThe progressive increase in the concentration of harmful, non-degradable chemicals at eachFood chains generally have only three or four steps becauseThe flow of energy in a food chain is