Which factor is more responsible to bring a change in climate, environment and landscape for the last 100 years?

Gurugram, a city about 30km southwest of India's capital New Delhi, had the worst pollution levels globally in 2018.

According to reports, about 2,200 metric tonnes of garbage coming from east Delhi is dumped at the landfill every day. Do we need Mountain of trash ?

River Yamuna 'close to death': New study warns Delhi's waterway is 'toxic' even after treatment and should not be used for drinking or irrigation. What we do ?