Cite the global temperature increase.There is also the fact that local climates are changing. Here in Georgia if you average the rainfall increase since 1958 it comes to about a .70" per year increase. Also, our drought and rainy seasons are becoming more accentuated. Remember: Global Warming and Climate Change!

Why do you want to argue? That will be my question to you. Do you have to respond to them arguing?

Global warming is occurring, even if they don't want to believe it. It's measured by the Sea Surface Temperature (SST) around the globe. Global warming is the reason for the loss in glaciers, loss in ice sheets, rise in sea level, and for the increasingly extreme weather events. Global warming is occurring, because of, and directly proportional to, the increase in green house gasses (carbon dioxide, methane, etc.).

The science behind this is not complicated, nor is it secret.

Maybe explain there is a difference between climate and weather.

[nasa.gov]

Where are you talking about? At your house? I just had a sandwich therefore no one is hungry

A single event does not prove or disprove GW. Likewise any single weather event cannot be reliably attributed to GW. But if we plot the frequency of extreme weather events then the frequency of these is increasing rapidly - in line with CO2 level rises. So it's down to probabilities and statistics not single events.
Another indicator is frequency of hurricanes, see chart. Again we can't say any one hurricane is the result of GW but the statistics speak volumes. Hope the chart is self explanatory

Someone who talks like that has been listening to Fox News and has already surrendered his brain. I don't even try to argue. Wouldn't matter, since he prefers "alternate facts."

Tell them to actually go learn to science and data behind climate change, or point them to a potholer54 video or something.

I'm not gonna sit there and lecture them on something they can research in no time at all. Climate change deniers have no reason to exist beyond being willfully ignorant of the facts.

You can always point to the fact that sea levels are rising. The Arctic, and Antarctic are melting. Weather is different from climate. Those are just for starters.

That the word "global" in "global warming" means THE GLOBE.

Global warming is a bad name for it because in some places it will get hot while others will get cold and that's what people don't understand because of it being called warming.

Global warming is not a reference to the current local weather. It refers to a. Long term trend in which the average annual temperature of the planet is increasing with time. Its effect on the weather depends on where you are. For New England, where I live, spring weather patterns occur about 2 weeks earlier than they did about fifty years ago. Fall is warmer and killing frost comes later. Winters are drier and spring is wetter. The jetstream is weaker and fluctuates more frequently than it used to@ This brings more artic chills from the northwest and warm masses of air when storms travel up the coast.

<sarcasm>What is Global Warming???</sarcasm>

Climate change deniers are on the same 'level of stupid' as flat earthers, I am not entirely sure if it is worth my time!

I can discuss politics and economics all day long because there is a lot of subjectivity involved with both, but global warming is just science, and if you deny the science behind climate change you are either full of shit, or a moron!

Answer with "It is not Global warming, it is Global climate change". The name "Global warming" is misleading, even I regularly make jokes on it of the kind "Where is the Global warming when we need it?" - when it is very cold. Yet I am definitely not a climate change denier - as I understand that global climate changes result in more extreme weather, and definitely sometimes in more extreme cold.

It is the same concerning the argument of macro and micro evolution. Time is the issue. On a year to year basis one speaks of weather. Over a period of over hundreds of years one speaks of climate change. The strongest argument the do have that is valid, is that we can only give weather forecast that are good for about two weeks at best, so how can we determine climate change?
The answer is that we can do scientific analysis of ice cores, tree rings etcetera to determine trends in climate for hundreds and thousands of years. It will be correctly asserted that these past trends do not necessarily determine the future.
Just like we evolve with every generation, the changes are unnoticeable and insignificant. We can go back a year and say no evidence of evolution as humans. If we go back 100,000 years there will be noticeable differences. This being said we can not analyze data from today and say even remotely what humans will be like in another 100,000 years. What we can say is there will be human change.

Leave them outside on a cold night so they can come to the conclusion that it is fucking cold regardless if it a few degrees higher or lower than past years.
Never argue with idiots! Let them be!

I look at it as being global climate change. A result is longer droughts, longer wet periods, higher winds in hurricanes, and it keep going. While a lot of the US is having colder weather, we, here in the northwest US are having a milder winter. 30 years ago, we noticed that the extreme events were getting larger. When we redid the precipitation - frequency maps, the 100 year rainfall was going up in general.

"And I suppose you think the sun revolves around the Earth...? Well, why not?* That's what you get when you attempt to reason things out purely on the basis of what you can see, without digging any deeper. Leave the science to the scientists, brainiac."

• might not be effective in all cases

Ice core borings… don’t lie..

Explain very politely that "global warming" or more correctly "climate change" means more energy trapped in the system rather than radiating back out into space and consequently more extreme weather events. I then suggest that they look at the effects of the Gulf Stream on local climate in the North Atlantic areas and point out that one of the effects of climate change is a weakening of the Gulf Stream meaning Europe and the NE seaboard of the US get to freeze their tits off. Then I direct them to an article such as this.
[e360.yale.edu]

As Bill Maher once said on this very subject: The sun goes down at night. I guess it doesn't exist!

Say now the term is Climate Change rather than global warming, though the average temperatures globally are on the rise, we get, all together , more extreme weather. More Snow, storm, ice cold, burning hot, drought, flood ... it is freaking obvious here in New Zealand, and in Australia. But I bet nothing was unusual over the last year in the bubble of the hardcore : "What climate change?" ( sitting up to their necks in flood water, or conversely in cities just about out of any water)

Weather will have more extremes as the globe warms, and while a specific location may be colder, global warming refers to the average global temperature.

I would tell them that each year since 2014 has been the hottest year on record, the next year hotter than the last. Weather is not the same as climate. I would also point out the sea levels rising and the polar ice caps that are shrinking.

I'm not sure they grasp it and logic doesn't seem to help people like that. I mean look at religion.