That's a really important topic and a critical one for our existence on planet earth! The problem lays in 2 key points:

1. The harm caused tho the planet and to us is gradual and cumulative - we don't see the effects our fuel consuming cars are causing when we don't look at the bigger picture and when we concentrate on our individual acts- we may think that we cause little harm but the accumulation of many people's actions makes a huge harm.
2. Fighting the pollution and damage most probably will cost us money and diminish the pleasures we are used to, in the short term. Eating cheap meat from animals grown in un-ecological, cheaper methods is saving you money, whereas ecological meat will cost much more. A green, electric car costs more and it might restricts our driving distances etc...

Should we be discouraged? No! In the long run overcoming this difficulties will help all of us!

Just a lady thought - using cryptos like bitcoin is really not ecological - the electricity consumed needs a lot of coal to be produced. So we rather use a coin that doesn't need power consuming mining - STEEM maybe?!