The natural gas industry has invested more than $747 million as part of a 10-year lobbying and political spending campaign to persuade federal authorities to ignore the dangers of hydraulic fracturing.

The natural gas industry has invested more than $747 million as part of a 10-year lobbying and political spending campaign to persuade federal authorities to ignore the dangers of hydraulic fracturing.

The natural gas industry has invested more than $747 million as part of a 10-year lobbying and political spending campaign to persuade federal authorities to ignore the dangers of hydraulic fracturing.

The natural gas industry has invested more than $747 million as part of a 10-year lobbying and political spending campaign to persuade federal authorities to ignore the dangers of hydraulic fracturing.

The natural gas industry has invested more than $747 million as part of a 10-year lobbying and political spending campaign to persuade federal authorities to ignore the dangers of hydraulic fracturing.

The natural gas industry has invested more than $747 million as part of a 10-year lobbying and political spending campaign to persuade federal authorities to ignore the dangers of hydraulic fracturing.

The natural gas industry has invested more than $747 million as part of a 10-year lobbying and political spending campaign to persuade federal authorities to ignore the dangers of hydraulic fracturing.

The natural gas industry has invested more than $747 million as part of a 10-year lobbying and political spending campaign to persuade federal authorities to ignore the dangers of hydraulic fracturing.