Problem: There are at least 3,223 named lakes and reservoirs in Montana, including Flathead Lake, the largest natural freshwater lake in the western United States. Other major lakes include Whitefish Lake in the Flathead Valley and Lake McDonald and St. Mary Lake in Glacier National Park. The largest reservoir in the state is Fort Peck Reservoir on the Missouri river, which is contained by the second largest earthen dam and largest hydraulically filled dam in the world. Other major reservoirs include Hungry Horse on the Flathead River; Lake Koocanusa on the Kootenai River; Lake Elwell on the Marias River; Clark Canyon on the Beaverhead River; Yellowtail on the Bighorn River, Canyon Ferry, Hauser, Holter, Rainbow; and Black Eagle on the Missouri River.
What is the name of the largest freshwater lake in western United States?
The answer is the following: Flathead Lake

Problem: To clean up pollution, the federal and local governments implemented numerous plans including the constant monitoring and reporting of environmental conditions, such as ozone and nitrogen oxides. When the levels of these two pollutants reached critical levels, contingency actions were implemented which included closing factories, changing school hours, and extending the A day without a car program to two days of the week. The government also instituted industrial technology improvements, a strict biannual vehicle emission inspection and the reformulation of gasoline and diesel fuels. The introduction of Metrobús bus rapid transit and the Ecobici bike-sharing were among efforts to encourage alternate, greener forms of transportation.
What pollutants does the city closely monitor?
The answer is the following: ozone and nitrogen oxides

Problem: In September 2003, a military coup was conducted. The military arrested Ialá on the charge of being "unable to solve the problems". After being delayed several times, legislative elections were held in March 2004. A mutiny of military factions in October 2004 resulted in the death of the head of the armed forces and caused widespread unrest.
When were legislative elections held?
The answer is the following: March 2004

Problem: The Carnival of Vilanova i la Geltrú has documented history from 1790 and is one of the richest in the variety of its acts and rituals. It adopts an ancient style in which satire, the grotesque body (particularly cross-dressing and displays of exaggerated bellies, noses and phalli) and above all, active participation are valued over glamorous, media-friendly spectacles that Vilanovins mock as "thighs and feathers". It is best known for Les Comparses (held on Sunday), a tumultuous dance in which 12,000 or more dancers organized into rival groups throw 75 tons of hard candies at one other. The women protect their faces with Mantons de Manila (Manila shawls) but eye-patches and slings for broken arms are common the following week. Vilanovins organize an elaborate ritual for the arrival of King Carnival called l'Arrivo that changes every year. It includes a raucous procession of floats and dancers lampooning current events or public figures and a bitingly satiric sermon (el sermo) delivered by the King himself. On Dijous Gras, Vilanovin children are excused from school to participate in the Merengada, a day-long scene of eating and fighting with sticky, sweet meringue.
What city's carnival has documented history from 1790?
The answer is the following:
Vilanova i la Geltrú