1.) The reporter noted: "There is a serious lack of resources available to us now.":

    |  The reporter noted that there was a serious lack of resources available to them then.

2.) They admitted: "The earth is now overpopulated.":

    |  They admitted that the earth was then overpopulated.

3.) Anna said: "To ride a bike is good for the environment and great for your health.":

    |  Anna said that riding a bike was good for the environment and great for his/her/their health.

4.) Scientists warn: "Oil spills damage the prime source of water for various cities, marine life and even affect birds.":

    |  Scientists warn that oil spilling damage the prime source of water for various cities, marine life and even affect birds.

5.) Our teacher explained to us: "Many chemicals destroy the ozone layer because they interact with ozone.":

    |  Our teacher explained to us that many chemicals destroyed the ozone layer because they interacted with ozone.

6.) A famous ecologist said: "The use of nuclear energy has led to the heat.":

    |  A famous ecologist said that using of nuclear energy had led to the heat.

7.) The author of the article stated: "The high amounts of air pollution are caused by the development of several industries and water pollution.":

    |  The author of the article stated that the high amounts of air pollution were caused by the development of several industries and water pollution.

8.) A representative of Starbucks claims: "If fifty customers a day in every Starbucks store brought their own mug, the resulting savings from unused disposables would be the equivalent of saving 300,000 trees.":

    |  A representative of Starbucks claims that If fifty customers a day in every Starbucks store had brought their own mug, the resulting savings from unused disposables would be the equivalent of saving 300,000 trees.

9.) I asked myself: "What are the ingredients of these cleaning products?":

    |  I asked myself what were the ingredients of those cleaning products?

10.) The professor taught us: "Don't worry about what the world is doing. Worry about your own deeds that are contributing to the numerous environmental problems on the planet.":

    |  The professor taught us not to worry about what the world was doing. Also he taught us to worry about our own deeds that were contributing to the numerous environmental problems on the planet.