Around the world, the Earth\'s average temperature has risen over the last century and is continuously rising every year. The climate change and severe weather conditions culminate into hurricanes, tornadoes, and droughts. Tragedy in Uttarakhand is a warning signal of our unplanned development. Havoc caused by Corona virus in a pandemic way has posed severe challenges to mankind. The book deals with different aspects of Pollution, management of solid wastes, petroleum hydrocarbons and water pollution, interactive effects of air pollutants on plants and use of green technology and bio-control methods of insect pests. Chapters are there on Carbon Sequestration in forest of Himalaya, effect of climate change on biodiversity of medicinal plants and issues related to altered lifestyle during COVID.'