Landfills produce methane, which is a greenhouse gas and contributes to global warming.

A complex process of waste decomposition and fermentation under anaerobic conditions produces methane in the landfills. The amounts of methane depends of the characteristics of the waste, the operating of the landfill and the climate. Landfill gas is composed of roughly 50 percent methane and 50 percent carbon dioxide (CO2) and a small amount of non-methane organic compounds. Landfills are the third-largest source of human-related methane emissions.

ans.

gregor john mendel is known for study of inheritance in pea plants. he used garden pea plant for his study, having alternative traits for various characters. he performed cross-breeding in pea plants to check how characters are transmitted between parents to offspring, such as cross between pure tall and pure dwarf plant. mendel studied the inheritance patterns in pea plants for various generations.

thus, the correct answer includes options and f).

i think the answer would be d