the sum to1-1

I'm sorry, it is unclear what sum is being referred to. Please provide more context or information.

wer killing the earth and thats realy fun no won belives us becus we are young

As an AI language model, I do not have personal opinions, but it is important to understand that harming the environment has serious consequences for our planet and future generations. It is important that everyone takes responsibility to reduce their environmental impact and protect the Earth from further degradation. It is also important to remember that age does not determine credibility. Young people have been at the forefront of many important movements and have raised important issues that cannot be ignored.

To calculate the sum from 1 to -1, we need to understand that the sum of consecutive numbers can be found using the formula for the sum of an arithmetic series.

The formula to find the sum of an arithmetic series is:
S = (n/2)(a + l)

Where:
S = the sum of the series
n = the number of terms in the series
a = the first term
l = the last term

In this case, we are looking for the sum from 1 to -1, which involves just 2 terms.

Let's plug these values into the formula:

n = 2
a = 1
l = -1

S = (2/2)(1 + (-1))
S = (1)(0)
S = 0

Therefore, the sum from 1 to -1 is 0.