Climatologists say that greenhouse gas emissions, such as carbon dioxide from burning oil and coal, contribute significantly to global warming.

VOA: standard.2009.11.09

Houseboats also contribute to the lake's pollution and the development authority says they should install small sewage systems.

VOA: standard.2009.12.16

And the committee wants to not only endorse, but contribute to enhancing that kind of international policy and the attitudes which he stands for."

VOA: standard.2009.10.09

Some political analysts say the unemployment and economic distress that contribute to hunger helped Japan's Democratic Party win a landslide victory in recent elections.

VOA: standard.2009.09.09

"He was a guy who tried to get people to work on their own behalf, to get things done and to try to have everybody contribute,"

VOA: standard.2010.01.16

The Royal Society is calling for the British government to contribute around $3 billion to fund the research into science that improves crops and sustainable crop management.

VOA: standard.2009.10.21

He says poverty, gender inequality, and conflict contribute to human trafficking, but it is the demand for unreasonably cheap labor and cheap goods that drive this unscrupulous trade.

VOA: standard.2009.10.19

He says plans by the United States and Russia to resume talks on reducing their nuclear arsenals could contribute to efforts to rid the world of such weapons.

VOA: standard.2009.09.29

UNICEF says girls who are educated can not only contribute to their families and their communities, but are also at lower risk of violence,abuse, exploitation and diseases, like HIV/AIDS.

VOA: standard.2010.05.19

He said that combined with strong international support from donor countries, supportive non-governmental organizations and an improved security situation should all contribute to a better future for the country's nine million citizens.

VOA: standard.2009.09.09

We can't keep shifting a growing burden to future generations. With each passing year, health care costs consume a larger share of our nation's spending, and contribute to yawning deficits that we cannot control,".

VOA: standard.2009.06.13

Brennan said the Obama administration will also focus on factors that contribute to terrorism, such as poverty, and a lack of education and other opportunities for young people in many developing areas of the world.

VOA: standard.2009.08.06

Once common in Europe and the United States, cases of obstetric fistula now occur almost entirely in the developing world where poor nutrition and girls giving birth before their pelvis is fully developed contribute to the risks.

VOA: standard.2009.12.23

"When women are accorded their rights and afforded equal opportunities and education and health care and employment and political participation, they invest in their families, they lift them up, they contribute to their communities and their nations,".

VOA: standard.2009.09.25

Speaking via Skype,she says no. "I think further studies will be necessary to show whether the differences we've demonstrated depending on delivery mode of babies when they first emerge into the world actually carry over time, and whether those differences might contribute to health outcomes."

VOA: standard.2010.06.30

"I think in the long run what this does is to contribute to what seems to be occurring right now and that is the retrenchment of the Republican Party, opting for purity of ideological beliefs rather than a broad-based appeal to the general public."

VOA: standard.2010.05.04