Hi Paramvir,
There is a difference between neem based pesticides and synthetic pesticides. Neem being available in nature, doesn't have a bad effect on our environment. During our childhood days, whenever someone had skin infection, the person was asked to take bathe in neem water. Neem branches and leaves were kept on beds of people etc. Some farmers are also just crushing the neem leaves, mixing with water and spraying it. Some farmers in Kerala are experimenting by mixing it with some other stuff like cow urine etc.

Our soil has become toxic due to the indiscriminate usage of synthetic fertilisers and pesticides. We need to get rid of those immediately.

Human race and mosquitoes are at war since time immemorial. Despite this, both these species are multiplying at nearly equal pace. They are evolving including genetic changes to combat the challenge of the other. For example, the people living in rainforests developed a physiological adaptation to the Plasmodium falciparum which is transmitted through mosquitoes. This physiological adaptation is known as sickle cell anemia where the hemoglobin takes the form of a sickle (daa in bengali) or crescent. This abnormal sickle celled hemoglobin doesn't allow the plasmodium to multiply as it bursts.

WHO has been trying many things including distributing mosquito nets treated with chemicals. Nothing has been successful. I am an optimist, however, I don't expect this war between mosquitoes and humans to end soon. Nor will both these species see any decline in their population.