Is technology a threat or a promise?

Technology can be a threat as well as a promise. Why is that so? It's very obvious, like in everyday life. Computers that we're using now is just an example. It improves our lives greatly, make life more convenient, more comfort and etc. Medical sciences are very improtant to the people too. They're new technologies people invented that helped sick people. Technology can be a threat too! People abuse it, and do whatever they like with it once they have it. Cars, air-conditionals are harming our environment even though it's a promising a comfort life. The gases given out are harming our ozone layer. These caused the temperature in rising greatly. In my opinion, this new technology is more of a threat than promise, we people abuses it even further, it will bring us more disasters instead of promises.