I consider myself one who does care, but environment doesn't make the top 10 of important issues for the masses. In truth, I can fully understand the apathy.
It's especially hard to care when the masses are taxed, compelled to recycle and told that high wattage appliances will be banned for environmental reasons (the stupidest bit of legislation to come out the EU for years). Then inconvenienced with other regulations and trivia. The big things are ignored. Insulation, combined heat and power schemes, transport, carbon and full lifecycle taxes on everyone even the large users, their premises and packaging, ending the hidden subsidies of roads.
The kids "care", but they care as well-programmed 21st C consumers. Emphasis on consume, despite our efforts.
Commerce is going the wrong way at ever increasing rate. Shortening the buying cycles for everything possible, ideally disposable everything. Packaging is increasing exponentially - for little gain, except for the manufacturer. The environmental credentials of nearly every business are an exercise in tokenism.
We get half a dozen bins and containers to pre-sort waste, a lot of which was exported as "recycling", a regulation to reduce wattage of appliances, giving us kettles that uses the exact same electric to make coffee, it just takes longer. Tesco and Amazon ensure those bins are always full.
The tory majority ensured the death of alternative energy subsidies and wrecked a nicely growing sector, and immediately increased fossil fuel subsidies months before the Paris summit.
So I fully understand why most individuals, including me, might look and think "what's the bloody point? You just OK'd fracking and more oil subsidies".