HARD (ER) KANJI - JLPT 2 KYUU

REMEMBER:
The Sun is to the left. The bottom-right has a friend, a warm friend.
あたたかい:だん warm; cordial
地球温暖化 chi kyuu on dan ka - global warming (also uses double the study!)
暖まる atatamaru - to warm up; warm oneself (note: 温まる is also ok)