It is possible that the weather in places that you have lived is a little warmer now than when you were younger. But even the true believers are claiming only an increase of a degree or two in the last 50 years, and the way “greenhouse gasses” are suppose to work that increase would be mostly at night while you were sleeping or trying to sleep. ON a humid or cloudy night we all experience a noticeable “greenhouse” effect... the temperatures do not drop nearly as much. In a place like Arizona where there is little humidity it can go from over a hundred degrees during the day to very chilly at night.
The theory of anthropogenic global warming is that a small amount of CO2 causes a larger amount of water vapor to be absorbed into the atmosphere. Water vapor is by far the most prevalent “green house gas” in the atmosphere. The amount of water vapor in the air can vary greatly, but typically makes up 2% to 3% of the molecules in the air. The amount of CO2 in the air can vary also but typically makes up about .04% of the air.
As far as your recollection of cooler weather during your youth... we have experienced cooler times during previous decades. But we also have more vivid memories of weather anomalies than more typical weather. Because worldwide and local temperatures are cyclic this means that at sometime in the future we will likely experience cooler temperatures again. Solar cycles and sunspots which have been accurate at predicting coming cool periods in the past seem to be indicating that within a few years we will be experiencing cooler temperatures. As it is satellite records indicate that there has been no statistically significant increase in temperatures in approximately 20 years. That means that any temperature variation is within the margin of error.
The greater concern that is being commented on is that in the far north, the summer temperature is about 10 degrees hotter. This is supposed to be melting the permafrost which releases a lot of CO2. Also it appears that for at least some arctic river systems, there is a lot of frozen methane deposits that are now being released and methane gas is said to be more dangerous than CO2 gas.