Whenever there is a special occasion or a festival where there are a lot of people, garlands made out of Asopalav leaves are hung so that the air gets purified and the atmosphere remains clean. Asopalav leaves, even after they are picked, continue to give oxygen for a long time.
The parmanus (atoms) in food carry vibrations of the person who has made the food. And it affects the person who eats it.
Our mind becomes like the food we eat. The parmanus in the food come from the intention with which it is made. If the person preparing the food has violent, harmful thoughts and if we eat that food, then those violent thoughts will influence our mind. In the same way the food which is made with the intention of the salvation of humankind, will alter the ‘parmanus’ of the person who partakes that food.
That is the reason why Prasad (vegetarian food cooked for temple devotees) is distributed to all devotees in temples. Prasad is not made to satisfy hunger or for good taste, but is made with the intention of the salvation of humankind. So never forget to have your Prasad when you visit temples!
Nobody runs this world. The world runs naturally. Neither we run it and nor does God run it! So many scientific circumstantial evidences come together to make something happen! For example, for a mango to become ripe, who do you think ripens it? Many evidences have to come together for mangoes to ripen so that we can then eat them.