Where did that 3% come from?
Your logic would have everybody going off half cocked wasting time and resources on unproven ideas. Reread the part about models. Models based on tested hypotheses are useful, and they put men on the moon, but models built on theories that can't be proven or tested can be distracting and wasteful. The climate change alarmists are telling you bad things will happen by the year 2100 and no one can predict anything that far out and very little just 20 years out. In 1900 the biggest pollution problem in NYC was horse poop. 20 years later it was a minor problem. No one predicted that. The Population Bomb idea went out the window in just a few years. 10 years ago did you hear about fracking and hydraulic drilling? 20 years ago? We were supposed to run out of oil before 1930, then in the 1970's they were predicting just a few years more. Predictions are frequently wrong. If you can predict correctly more often than not, go to Vegas and make your fortune. And be sure you get there in a Leaf.
BBC News - Is population growth out of control?
The respected broadcaster and naturalist, Sir David Attenborough, told the BBC recently that population growth was "out of control" - but one expert says the number of people on the planet could peak in 40 years. Who should we believe?
Population Trends: Rapid Growth in Less Developed Regions: Population & Development : UNFPA
How the World Can Get a Handle on Population Growth - US News
According to the U.S. Census Bureau, there are approximately 7,113,749,767 people on the planet, with another million arriving about every five days. The United Nations estimates that the world population at the end of the century will be around 11 billion, and many fear that the planet's natural resources are insufficient to accommodate such growth.
https://www.populationinstitute.org/resources/whypopulationmatters/
While public concern about rapid population growth has subsided in recent decades, world population is still growing at about 80 million people a year, or about 220,000 people per day. If current trends persist, there will 2.5 billion more people on the planet by mid-century, bringing the total to about 9.2 billion. That projected population growth raises a host of questions about the future of humanity and the planet we inhabit.
The Big Picture: Population Facts, Problems and Solutions.
Population growth is a root cause of many environmental and social problems:
These range from life-threatening to simply disruptive. They include:
Over 1 billion people do not have enough food and safe drinking water.
Global warming is disrupting our ecosystems and threatening billions of people with dislocation.
Energy sources, from wood to oil, are becoming scarcer and harder to reach or extract.
Due to population pressures, people now live in areas that are basically unsafe. Hundred of thousands of people died in 2010-2011 because they lived on floodplains in Pakistan or by the tsunami-prone coast of Japan.These regions were sparsely populated 30 years ago.
Population growth shares complex ties to poverty and inequality, exacerbating the gap between the wealthy and the poor, and complicating access to Earth's finite resources.
In the U.S.alone, sprawl destroys 2.2 million acres of farmland, ranchland and forest every year.
Americans spend an average of 55 workdays (2200 hours) per year stuck in traffic.
Not a good comparison to support your opinion. The challenges have not gone away...look around.
Loren