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Air cargo company Atlas Air Worldwide Holdings said Wednesday it earned $43.2 million or $2.01 a share in the second quarter, up from $10.7 million or 51 cents a year ago.

Just weeks after Environmental Protection Agency Administrator Stephen Johnson said he would delay ruling on California’s nearly 2-year-old request for approval to limit vehicle emissions of greenhouse gases until the end of the year, a Senate committee passed a bill directing him to decide by October.

Iowa Gov.

Heavy-duty truck maker Paccar Inc. said Tuesday its second-quarter profit fell 19% as North American heavy-duty truck demand declined due to new U.S. clean air regulations.

Forward Air Corp., a contractor to the air cargo industry, reported its second-quarter profit declined, and the company said it would acquire an Indiana carrier.

American Trucking Associations and the Canadian Trucking Alliance Tuesday urged state and provincial governments to revise their fuel tax systems to encourage truckers to use truck idling reduction technology.

Volvo AB and Mack Trucks have agreed to develop a heavy-duty diesel engine that would use 10% less fuel and emit 10% less carbon dioxide than 2007 engines under a new agreement between the U.S. and Swedish governments.

Truckers who have purchased heavy-duty tractors with 2007 engines say the vehicles have run as well, if not better, than previous engines in terms of fuel, performance, reliability and maintenance.

The national average price of retail diesel and gasoline both increased last week, the Department of Energy reported, at the same time it was projecting the fuels will continue to climb for the remainder of the summer.