Water. The basic source of life. Commonest substance in the universe. One of the elements. we dring average 1 l per day, accumulating the same hundreds of thousands of plastic bottles. And just after drink the life-giving fluid, sqush the bottle reducing its volume. Definitely, we shouldn't burn plastic bottles. Unfortunately, it's still a common practice in our society. Let's react, unless we don't want to live in primitive society. I have one request. Gather caps. It's not a lot of effort and energy but it's the opportunity for additional funds for people in need. I'm sure that there is someone in your area who is in need, furthermore by collecting caps you reduce volume of litter. You will help suffering and environment at the same time. I thing it's worth it.