Please point to any source (not obviously islamic propaganda) of Hamas not being an islamic organization. I'm not saying it's what makes them the bad guys, just that it's dishonest to say they have "nothing to do with religion"
Hamas, an acronym of its official name, Harakat al-Muqawama al-Islamiya (Arabic: حركة المقاومة الإسلامية, romanized: Ḥarakat al-Muqāwamah al-ʾIslāmiyyah, lit. 'Islamic Resistance Movement')
"Energy contained in coal" doesn’t make any sense. Is it "energy we could get from burning coal if it was 100% efficient"? "Energy we could get from coal if we could use it in a nuclear reaction"?
Coal (anything) doesn’t "contain" energy. We can transform some things, and some transformations produce energy in some form or another.
The upper line of this graph should be labeled "total energy liberated by burning coal" and the lower one "useful energy liberated by burning coal".
I would guess all of these are included in the 4.4 million