LPG rebate - what's its future?

Aaah yes, but how many motor vehicles and factories pouring out pollutants were there on earth 500 yrs ago, 10,000 yrs ago, 743,921 yrs ago. Not many - in fact NONE at all. Yes the earth probably will take care of itself with the demise of all living beings THEN over the nexxt few million or billion years it might regenerate back to 'the way it was'. I do hope that my viewpoint is not too simplistic for you.
Diesel fuel has proven to be one of the dirtiest and unhealthiest of fuels with huge amounts of carbon depositied into the atsmophere. Yes I know that there are Euro 4 spec vehicles out there but there's still an awful lot of old oil burners spewing out garbage.

Was you around back then was you , why don't you do a little research on the Earths history, you might just find there was many many Volcanoes spewing toxic gasses into the atmosphere, more than all the cars have since cars were invented,
Then there was the Meteor Impacts, Projectiles also contain sulfur-bearing mineralsatmospheric sulfur A 2 km asteroid impacting on land would kill half of humanity on the day by fire, earthquakes, erupting volcanoes, billions of ejected boulders and rocks flying around, super hot winds and floods. Says Jon Murrie:

The stuff reentering would look like lots and lots of shooting stars…like a glaring layer of material above you of several thousand degrees celsius…like being under a griller. (The Advertiser 1993 June 12)
Most initial survivors would die later from consequences of soot and dust saturated air, acid rain mixed with toxic metals, food-chain destruction, famine and freezing temperatures.
If that sounds terrifying consider a 10km asteroid arriving at 25km per second on land. The energy released would be 117,000,000 megatons, equal to 9,000,000,000 (9 billion) Hiroshima bombs or over 2 million times the power of the largest nuclear device (57 megatons) exploded by humans.
A 200km wide crater would form. One million cubic km of rock would be ejected forming layer upon layer of glowing hot material circling the planet and causing a worldwide firestorm. Billions of shooting stars would fill the sky. Hundreds of reentering rocks would be over 100 meters wide — each by itself able to cause devastation across hundreds of kilometers. Impact energy transmitted through the planet could break open the opposite side causing massive lava flows. The sound of the initial impact would be heard around the planet. Part of Earth’s atmosphere would be blown off into space. A thousand kilometers from the impact winds of 1,000 km/h would flatten cities and sweep away the rubble! [Wind speeds of only 254-332 km/h “destroy well-constructed buildings” and winds of 333-419 km/h would level them. And your worried about the little pollution microscopic humans cause...get outa here ,

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DIO
And if you would like to improve your intelligence a little further why not have a look at my Pat particular attention to the site about Manicouagan Crater


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Doug is correct in both his statements. The earth will survive and humans will not.