You really need to work on your critical thinking.
Firstly, no, a single kid in the West can't stop China from polluting the oceans. But does that mean they should shut up and say nothing?
Secondly, the idea that because China is the worst offender, that lets the UK off the hook, is just ridiculous. If you take that "thinking" to its logical conclusion, it means that countries are only required to tackle environmental problems in strictly reverse order of their impact. Even the US (in second place in the CO2 emissions league) could logically use the same excuse - it doesn't have to do anything until China reduces its omissions and drops down into second place. It's a logical nonsense and an excuse for blaming someone else and doing nothing ourselves.
Thirdly, much of China's omissions are a byproduct of supplying consumers in the West anyway.
Fourthly, China has a bloody massive population. Its emissions
per head are
similar to ours and much lower than those in the US.
I know a bit about this, and it's simply not a statistically significant problem, and furthermore you are blindly ignoring the
number of birds killed by conventional power generation. It's just lazy, unscientific thinking.
You really should be a bit more sceptical about some of the highly motivated and well-funded sources that seek to undermine the environmental movement for their own ends, and stop being one of their useful idiots. Do you never wonder who funds the "Global Warming Policy Foundation", why organisations like that have such blandly worthy sounding names (when their aims are anything but neutral), and why they're so keen that we don't find out who funds them? There's the
real conspiracy.