Respectfully, you've misunderstood what they mean by urbanization in those articles and completely missed their point, which is about the growth of urban areas

Respectfully, you've misunderstood what they mean by urbanization in those articles and completely missed their point, which is about the growth of urban areas (which includes suburbs) in general: "It’s true that as people in developing nations move from the countryside to the city, the shift may reduce the pressure on land, which could in turn be good for the environment. This is especially so in desperately poor countries like Madagascar, where residents in the countryside slash and burn forests each growing season to clear space for farming. But the real difference is that in developing nations, the move from rural areas to cities often leads to an accompanying increase in income — and that increase in income leads to an increase in the consumption of food and energy, which in turns produces an uptick in carbon emissions." In other words, wealthier people living in urban areas -- in both city cores and in the suburbs -- are worse for the environment than rural poor folks, and as developing nations urbanize, we can expect to see an increase in these impacts.