11.11.2019 The G20 States are respondable for 80% of CO2 Emission:
Spiegel Online (SPON) gopher://gopherspace.de/0/journalist/magazin.php

USA, Russia and Saudi Arabia are the first three oilproducers:
gopher://gopherpedia.com/0/List of countries by oilproduction
from https://en.wikipedia.org/wiki/List_of_countries_by_oilproduction
If not reachable, see the list from 2019 under the directory
Oil_Production.