If indefinite articles are the proverbial thorn in your side, the good news is that you don't need a lot of grammatical jargon to understand their usage. You simply need your ears (okay, and maybe just a little grammatical jargon).
In English, a and
Award on combating climate change impacts in Africa
“Our Climate is Our Lives” initiative
MoUs to produce green hydrogen
Presidency of the Arab Republic of Egypt Website
Ministry of Environment