ことから

The phrase ことから can be used to express the reasoning for something. It often translates as "because" or "from the fact that..."

エコカーは空気を汚さず、ガソリン代もあまりかからないことから、環境にやさしい車だと言える。
Since eco cars don't pollute the atmosphere and don't take very much in gas, it's said that they're a good car for the environment.

どんな所にでも自動販売機が置いてあることから、日本は犯罪が少ない安全な国だと言う人もいる。
There are people who say that Japan has little crime and is a safe country, based on the fact that there are vending machines placed no matter where you are.

土の中から魚の骨や貝などが出てきたことから、ここは大昔、海だったということが分かった。
Because things like fish bones and shells turned up in the earth here, they've discovered that it used to be ocean long ago.

リーさんは野菜が好きじゃなくて果物だけ食べてることから、誕生日にりんごの木を贈ってあげるのが決めてたんだ。
Because Lee-san doesn't like vegetables and only eats fruits, for his birthday I've decided to get him an apple tree.