what are the problems by eating non veg

The arguments for being a Vegetarian are overwhelming, some of these are as follows:

1. Humane / Moral : The basic premise here being that eating non-vegetarian food causes pain and suffering to the animals that are killed for food. The common counter arguments made here are that, plants suffer to, and that animals that produce milk & poultry suffer too, which are both factual points. However, the counter to this counter-argument is in regards to the ‘level of pain & suffering’ involved, it can be argued that plants would ‘feel’ very little pain relative to a pig been slaughtered. Similarly, the milch cow would suffer less, relatively speaking, when compared to a cow that is slaughtered for beef. Similarly, it would be more humane to a chicken as opposed to a pig (which is considered a very intelligent animal and even know when it is going to be slaughtered).
So if you want to be an individual that is kind and empathizes with other living beings, be a vegetarian.

2. Environmental: As someone as already pointed out and as established by various Organisations & Agencies around the world, more natural resources (Water, Agricultural land, Human Resources) are consumed when animals are reared for their meat.
“Growing meat uses so many resources that it’s a challenge to enumerate them all. But consider: an estimated 30 percent of the earth’s ice-free land is directly or indirectly involved in livestock production. ”
“The environmental impact of growing so much grain for animal feed is profound. Agriculture in the United States — much of which now serves the demand for meat — contributes to nearly three-quarters of all water-quality problems in the nation’s rivers and streams, according to the Environmental Protection Agency.”
So if you care for the future of our Planet and our environment, it is better to be vegetarian.
Rethinking the Meat-Guzzler

3. Personal Health: Again, this is something well studied and established the world over, vegetarian foods are much healthier for you.
“Our findings, published in top peer-reviewed journals, pointed away from meat and milk as the building blocks of a healthy diet, and toward whole, plant-based foods”.
Would We Be Healthier Going Vegan?
So if you want to lead a healthier, higher quality life, be a vegetarian or even better vegan.

4. Religious/ Philosophical: Various religions like Hinduism, Jainism & Buddhism state that all living things have a right to live and that all human being must practice ahimsa – ‘non violence’ against all living creatures.
“Ahimsa is a multidimensional concept, inspired by the premise that all living beings have the spark of the divine spiritual energy; to hurt another being is to hurt oneself. Ahimsa has also been related to the notion that any violence has karmic consequences.”
So if you want to be more in touch with your inner divinity, practice ahimsa, be vegetarian.Ahimsa

5. Economical:Feeding the World population would be cheaper and more efficient if people followed a vegetarian diet. Calories produced through grains and vegetarian foods would be cheaper when compared to calories obtained through livestock.
“Though some 800 million people on the planet now suffer from hunger or malnutrition, the majority of corn and soy grown in the world feeds cattle, pigs and chickens. This despite the inherent inefficiencies: about two to five times more grain is required to produce the same amount of caloriesthrough livestock as through direct grain consumption,