Air New Zealand will invest NZ$1.8 billion in aircraft over the next three years; planning to introduce two new Boeing 777-300ERs, six Boeing.787-9s, nine Airbus A320s and four ATR72-600s. Operating cash flow peaked at the company’s highest ever levels this year at NZ$750 million. Airline plans to use funds to re-invest in business. “Strong results allow Air New Zealand to reinvest in its products, services, training and development to further enhance the customer experience and to connect more people and businesses than ever to, from and within New Zealand,” Air New Zealand chairman John Palmer said.
Ranchers giving their cattle antibiotics may be doing more than creating drug-resistant microbes: They could be boosting greenhouse gas emissions as well, a new study suggests. Researchers looked at the effect of a 3-day treatment of tetracycline, a commonly used antibiotic, on the amount of methane generated within the manure of cattle. Over the course of the experiment, emissions of planet-warming methane from the dung of antibiotic-dosed cows were, on average, 80% higher than those from the manure of untreated cattle, the team reports online today in the Proceedings of the Royal Society B. The boost may be due to a relative increase in methane-producing microorganisms called archaea in the digestive systems of treated cattle due to the suppression of antibiotic-susceptible bacteria, the team suggests. The findings are the first to note increased greenhouse gas emissions due to antibiotic use in cattle; a recent study suggests that methane emissions from cud-chewing livestock worldwide, including cows, account for about 4% of the greenhouse gas emissions related to human activity. Because methane emissions from a cow’s manure are typically lower than those released from its belching, future studies should look at the effect of antibiotics on that source of the greenhouse gas, too, the researchers suggest.