Add air pollution to the list of woes from the deadly Texas freeze FacebookTwitterEmail 1of12 Texas Commission on Environmental Quality investigators Natalie Izral, Uchechi Nwaiwu and Sam Cortez conduct handheld air monitoring surveys in the Manchester community of Houston.Marie D. De Jesús, Houston Chronicle / Staff photographerShow MoreShow Less 2of12 Manuel Gonzalez and Natalie Izral conduct air monitoring surveys using the TCEQ’s new Strategic Mobile Air Reconnaissance Technology (SMART) van in the Manchester community of Houston, Tuesday, Feb. 23, 2021.Marie D. De Jesús, Houston Chronicle / Staff photographerShow MoreShow Less 3of12 4of12 State environmental investigator Sam Cortez conducts handheld air monitoring surveys in the Manchester community of Houston, Tuesday, Feb. 23, 2021.Marie D. De Jesús, Houston Chronicle / Staff photographerShow MoreShow Less