helllooo there please help

91. This is termed as the warming of the Earth's surface due to greenhouse effect. 92. This law aims to protect the country's water bodies from pollution from land-based sources (industries and commercial establishments, agriculture and community/household activities). 93. This is the oxygen equivalent of organic matter. It is determined by measuring the dissolved oxygen used by microorganisms during the biochemical oxidation of organic matter in 5 days at 20C