The paper argues that current world developments are starting to resemble the "pollution crisis" scenario in The Limits to Growth book from 1972. Ongoing global warming increasingly demonstrate the reality of two major structural assumptions in the Limits to Growth models: namely 1) long reaction delays from pollution levels to corrective action, and 2) self-reinforcing feedback from the pollution level to pollution absorption time, and back to the pollution level. If left unchecked, these mechanisms could generate a climate crisis in the 21st century. The paper seeks to highlight the strength in high level system dynamics conceptualization.