The formation of ozone hole in the Antarctic region has been a cause of concern. What could be the reason for the formation of this hole?

Regarding "carbon credits", which one of the following statements is not correct?

Consider the following statements: Chlorofluorocarbons, known as ozone-depleting substances, are used. Which of the statements given above is/are correct?

The acidification of oceans is increasing. Why is this phenomenon a cause of concern? 1. The growth and survival of calcareous phytoplankton will be adversely affected. 2. The growth and survival of coral reefs will be adversely affected. 3. The survival of some animals that have phytoplanktonic larvae will be adversely affected. 4. The cloud seeding and formation of clouds will be adversely affected. Which of the statements given above is/are correct?