Some possible Revision Notes for the chapter " Environmental Issues" in Class 12 Biology are:
1. Ecosystem: An ecosystem is a community of living organisms, along with their non-living environment, interacting with each other. It has many components and functions in a balanced manner.
2. Biodiversity: Biodiversity is the variety of life on earth. It includes species diversity, genetic diversity, and ecosystem diversity. It is essential for maintaining ecological balance.
3. Pollution: Pollution is the introduction of harmful substances or products into the environment, causing harm to living organisms and degrading the environment.
4. Global warming and climate change: Global warming is the gradual increase in the Earth's temperature due to the release of greenhouse gases, primarily carbon dioxide, into the atmosphere. Climate change refers to changes in the climate pattern that are affecting the Earth's ecosystems, resulting in several problems such as rising sea levels, melting glaciers, and frequent natural disasters.
5. Deforestation: Deforestation means the loss of forest cover due to human activities, leading to the degradation of soil, loss of biodiversity, and climate change.
6. Ozone depletion: The ozone layer is a vital part of the Earth's atmosphere that protects the planet from harmful UV radiation. The depletion of the ozone layer caused by human-made chemicals like chlorofluorocarbons (CFCs) can lead to health problems and environmental damage.
7. Waste management: Waste management involves controlling, collecting, and disposing of waste materials in a sustainable manner, to protect public health and prevent environmental pollution.
8. Sustainable development: Sustainable development aims to meet the needs of the present generation without compromising the ability of future generations to meet their own needs.
These are some of the key concepts and topics covered in the Environmental Issues chapter of class 12 biology. Understanding the causes, effects, and solutions to environmental problems is crucial for the survival of our planet and the life it supports.
More:-
click here for other Chapters of Biology.
.jpg)
