Explore the four major environmental problems posing the greatest challenges for our planet. View in your browser What Can We Do To Protect Our Future? This Earth Day, Britannica explores four environmental problems that pose the greatest challenges for our planet in the 21st century. Our editorial team examines the causes of and potential solutions to each issue through meticulous research and contributions from experts. Immerse yourself in articles, galleries, videos, and more as we help you learn about ways to make a more sustainable future. Explore the Major Issues Find out how global warming affects climate and explore the different ways climate change is occurring as well as what has been and could be done to manage the problem.   Explore the issue   Learn about various types of pollution, how each affects the environment, and how people and governments can work at all levels to limit, reduce, and even eliminate the harmful effects of pollution.   Explore the issue   Learn about the causes and effects of water scarcity at a global level, and about some of the strategies and solutions that can help us address it.   Explore the issue   Explore the major threats to biodiversity and learn what can be done to protect the planet’s precious plant and animal life.   Explore the issue   This email was sent by: Encyclopædia Britannica 325 N. LaSalle Street, Suite 200 Chicago, Illinois, 60654, United States To unsubscribe, update your profile here. © 2019 Encyclopædia Britannica, Inc. Privacy Policy — Help