Environmental Issues Class 12 : Human population explosion increases the demand for food, water , home , electricity , roads , automobiles etc. Pollution is any undesirable change in physical, chemical or biological characteristics of air, land, water or soil.
Organisms and Populations Class 12 : Ecology refers to the interactions among organisms and its physical or abiotic environment. Ecology is basically concerned with four levels of biological organisation. Organisms-populations-communities-biomes.
Strategies for Enhancement in Food Production Class 12 : Animal husbandry is the agricultural practice of breeding and raising livestock. It helps in increasing the food production along with plant breeding also. It involves caring and breeding of livestock such as buffaloes, cows, pigs, horses, cattle, sheep, camels, goats, bees silkworms etc. and also poultry