Explore the personal infinitive as Lúcia and Mariana discuss life in the city vs. the countryside.
A kitchen disaster unfolds when siblings blame each other for the mess all over the floors and walls.
IPCC report says it's unequivocal that human activity is responsible for global warming.
Basking in global warming.
Calentamiento global, un problema de todo el mundo
Many scientists are wondering whether it’s now too late to stop global warming.