Not evidence, observation of the lack of supposedly inevitable consequence. I don't see why it would be hard to understand Garp. When water level rises it is observable and measurable. As a child my grandparents lived in a waterfront property directly adjacent to sea water affected by tides dependent upon water rising and falling in the adjoining Pacific Ocean. All around the area are wharfs and jetties, boat ramps, bridges, culverts and other permanent landmarks that can easily be used to measure water levels. There are whole suburban areas that are built on ground so close to high tide sea level that the canals and roadside drains throughout ebb and flow with the tide. This is not a unique location in that respect and it is found everywhere around the world. In the more than 50 years I've been aware of these water levels, they have not changed at all. The mud flats are still exposed at low tide and the high water marks are still at the same levels they always were.
As you know water finds its own level so apart from some sea surface level bulging due to atmospheric pressure and flow restrictions, if the sea level were to rise it would rise globally and be measurable everywhere. The point is it just hasn't. There's nothing better than fear to control the masses.
I'm just watching our morning news and once again the Paris targets, the costs involved, the partisan politics involved and figures on emissions and targets roll from the politicians tongues. Reliable power, renewables, big batteries, hydro extension, climate targets etc etc. It is a partisan political football and even the conservatives are split over the validity of the science. The hard right deny climate change exists but the moderates want to retain power and must appease the centre ground and hopefully drag some of the left swing voters over. Our elections are fought, won and lost on less than 5% of centre swing voters and so surprise surprise, our current Prime Minister has just announced. $2 billion funding for climate change which, as reported, is a hot issue for the voters. 2 months out from the election it would be forgiven to question the timing and reasoning for such a commitment of funding. This is while some parts of the country experience complete blackouts in peak demand. They won't replace old coal power stations with new technology as they are taken off grid, but will gladly sell millions and millions of tonnes of coal to be burnt overseas. Hypocrisy in its purest form. If these political leaders truly believe fossil fuel is killing the planet and Australia can do anything at all, the first and most obvious thing to do is to leave the coal in the ground. But they don't. Why do you think that is? Here's why.
https://www.australianmining.com.au/news/coal-pass-iron-ore-top-australian-export/Australian facts. 1.3% of total emissions. TOP 10 for per capita. Coal exports for 2018, nearly 400 Mt worth $60 billion. This is projected to keep rising with Asian demand for thermal coal adding another 200 Mt by 2023. If you add this exported 18 Tonnes of coal per capita in Australia to our actual locally used emissions it effectively doubles our per capita output which makes Australians the worst in the world.
If our politicians honestly expect me to believe that they believe there is a problem, this would be the best place to start. don't you think? We can immediately halve our contribution to global emissions by ceasing exports. Don't hold your breath.