Vulnerable Population (image) Earth Institute at Columbia University Share Print E-Mail Caption In Bangladesh, one of the most vulnerable countries, a crew excavates a riverbed for a new bridge. Outdoor labor is a way of life in many of the regions subject to the worst heat and humidity. Credit Kevin Krajick/Earth Institute Usage Restrictions Credit must be given. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.