What are 3 negative impacts about pollution

Three negative impacts of pollution are it causes air pollution, water pollution, and the greenhouse effect. Air pollution causes diseases that kill almost 100,000 people every year. Water pollution causes a lot of our waterways to be polluted and as a result, various natural habitats are killed, and even some end up becoming extinct. The greenhouse effect is caused by air pollution and the average mean temperature has increased on this planet. The greenhouse effect has also been able to increase the melting of the arctic and Antarctic.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.